Help Installing Xvnc on Linux Release 9

[Jason May]

I am trying to install Xvnc on a Linux box (Release 9) and I am having
problems with XFree86.  I check to see if it was running and nothing.
So I downloaded a copy and went to install it and it said that there was
already a version installed.  So I tried to start XFree86 and nothing.
Can someone please tell me what to do?  I have read quite a bit on
XFree86 and what I think I read is XFree86 is included in the install of
Release 9.  This is a dedicated server that I rent from a company and
they haven't gotten back to me.  I am trying to set up a system like
gotomypc.com or logmein.com.  Can someone also help me with that, as far
as how to set up the Xvnc.  
 
Sorry about all the questions, I am new to all of this.  I have one last
question, I am installing Xvnc on my Linux box and the customers will
connect to the Linux box with a reverse connection (Customer to Linux
box, not Linux box to Customer).  How do the technicians make the
connection to the Linux box with the Java plug-in for their web browser?
I have seen http://computername:Port <http://computername:Port/>  but I
don't think this will work over the internet.  Can someone help?  Thanks
everyone in advance.
 
 
Best Regards,
Jason May